Richard Burr Refuses to Say if Brennan, Clapper Will Testify About Origins of Russia Probe

BALLASY: "I want to get a quick — just want a quick quote from you on the Donald Trump Jr. situation, the subpoena."

BURR: "No quote. You need to talk to him."

BALLASY: "All right, thanks, Senator. Do you plan to investigate the origins of the Russia probe and subpoena Brennan and Clapper?"

BURR: "I don't talk about any witnesses' engagements. Thanks."